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TO THE EDITOR: We read with great interest the article by Brinjikji and colleagues1 (Brinjikji W, Cloft HJ, Flemming KD, et al: Pure arterial malformations. J Neurosurg 129:91–99, July 2018). The authors presented a consecutive series of 12 patients meeting criteria for a pure arterial malformation (PAM). First described in 2013 by McLaughlin et al.,2 these malformations have been defined as vascular lesions with dilated, overlapping, and tortuous arteries, with no venous component or arteriovenous shunting. Pure arterial malformations are thought to have a pathophysiology and natural history different from
SilvaMASeeAPAziz-SultanMAPatelNJ: surgical treatment of a double origin posterior inferior cerebellar artery aneurysm and insights from embryology: case report and literature review. Oper Neurosurg (Hagerstown)13:E8–E122017